CSS Concrete Solution - the ultimate water proofing solution provider for your concrete. CSS Concrete Solution is an UK-based company providing chemical waterproofing solutions for your concrete. As the authorized distributor in the UK of Kryton International Inc. Canada, we use the latest crystalline technology to provide innovative waterproofing solutions to the construction world. The revolutionary technology behind our products is deemed to transform the way buildings are protected against ground water as well as surface water.